Grinding device for machine-tools.



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GEINDING DEVICE POB MACHINE TOOLS.

APPLIUATION FLED DEU. 9, 1912.

Patentef Get. 7, 15H3.

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L. EIXLEY. GRINDING DEVICE POP. MACHINE TOOLS.

APPLGATIR 'FILEE DEO. 9, 1912.

Patented Oct. 7, 1913.

2 SHEETS-SHEET 2.

HENRY L. PIXLnY,or"cr.nvnLANp, orrro.

GRINDING. DEVICE FOR MACHINE-$00113 Specification of Letters Patent.

' rat-tente. oct. wie.

appueetion mea December e, 191e. serial no. wassen To all w/wm t may concern C Be it known that I, HENRY L. PIXLEY, a. citizenof the United States, residing at.. Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful lmprovements 1nl Grinding Devices ,for Machine-Tools, lofu'rhich. the fol.-

Cfr

1 to the lowing is @specification p v w This invention relates. to a grinding device for machinetools., andthe invention consists .in a device- -rnore especially const-ructedand arranged asherein shown for sharpening planer knives.

`In the aecompanyingdrawings, .Figure 1 is a sidfeevaton'ofmynew and original attachment; hrokeniou't at oneend andshown inworkingfrelation on a machine shaft and cutter blades thereon. Fig. 2 is an y' endlelevation Showing the means of supportl vided The formation oit' jdoivn under adjustment by for theattachmexit upon; the machine shaft, and Fig. Siei :substantially similar elevation showin" "port'at the ot-l'ier end er and grinder in that tion of Fig. 2 omitting the motor chamber Yexcept a fra ment. Y

pendent of the tool carrying shaft s and 'the knives or blades b supported` thereon and to which the attachment is brought to 'do the sharpening without .removing the knives. The said de Yice or attachment consists, first. of a frame of peculiar and original construction adapted to carry the operating parts including the grinderg, and .the saidH frame comprises'rigid arallel guide bars'v2 one, above the other ant provided each with a rabbet lengthwise inside on their top as seen incross sectiom' Fig. .Spend ,servin'T as guide-ways for the'hody or head. e which carries the motor chamber c andthe grinder ,r/,suspcnded therefrom on the'mot-or shaft.

these latter partsis turthcr seen in Fig. 4' in which the saidbody fiis shown in plan or edge View and.' is proon its face with vertically disposed under cut or-beveled lugs or ribs 5 yadapted to serre as guide-Ways for the vertically disposed hanger Il having` beveled edges continedin 'said guide-Ways to slide up and Y and controlled screw 3 engaged through t erightangled head'of said hanger and. having its bearing,

in the bodye' as seen at lgzwhereby the motor chamber-is adapted to be raised and lowered and the-.grinder therewith as presently seen.

The motor inclosure or chamber c is piv- 'otallgty supported upon or from the hanger ZL on a pivot screw or pin 10V above the'middle of the. said chamberI and is adaptedto -swing; upon said pivot withinlimits fixed by opposite screws 12 through said' lugs or guides 5 on the hack of body 4,.; accordingr to the position desired for thegrinder, as `seenn full and dotted lines, Fig. grinder is mounted shaft 14, or an extension thereof, .and the said motor is prei a. rat. ma

15 are provided` at the top -of the motor chamber which are adapted to swing'the motor on its pivot as above described and according to the grinding. action that ma. for the time be' desired upon the blade Y). That is it-serves grinding shall be at one inclination or an.- -other across the blade, as seen-'in FigQS. l\low,.the means for securing thejvsaid frame svith its parallel bars posts or pieces m and n upon the machine are seen clearlyin Figs. 2 and, and in the case of the post m it will be seen that -the said post is cnrrodto a substantially right angle in its lower portion and is providedivith an over reaching arm 1.7 on itsv upon saidlshaft. This brings thesaid supf port or post m into direct or immediate touch with' the shaft whichcarries the blades .to he groundand eliminates all intermediate mechanism heretofore ein ployed and through which vit seemed impos- 'sihlevto get uniformity-of grinding the full length of the blades., Set screws 22 and 23 engage the shank 24: of said bearing memberE o and serve to make refined adjustments and to rigidly ix said parts together. The

grinder isi-supported slidably hack and forth on `the said trame hars 2 through the head jor body and the motor chamber is respoir .sive to the' close.- adjustments obtained through .sa-id screii.A- 22 and at that. end

directly upon' the motor Handles member o has.

erably 'of the electrical type and carriedvin said chamber.

to determine whether the v 2 andthe supporting of the attachment while the other end is supported by post n directly upon the pulley 25 upon the corresponding' end of .shaft fs'. The said post or support 'n likewise is curved to a right angle and is provided with a separable bearing member 26 at its bottom engaged on said pulley and thus this end of the attachment also is brought into practical engagement with shaft s and Where the support for `the attachment cannot deviate when the engagement has been properly made and adjusted Obviously, when sharpening' of the knives or blades 7) is in progress the shaft s is stationar f, and the grinder g alone is revolved, and this also presupposes the bringing of theI knives into exact relations with the' grinder so as to out at the right bevel or angle, certain latitude of movement of the grinder being however allowed as the sharp ening proceeds, as is. seen in the spring' provided for by set screws l2, Fig'. e, and as 4shown in dotted lines, Fig. l.

The pulley 25 is provided with graduz-iting marks or lines 30 at certain points agreeing with the adjustments to be made to bring" the blades in right relations to the grinder for sharpening, and a set 32 is lixed in the support n and has a right angled indicating point adapted to register With a given niark 30 and thusaccurately give the ri'ght rot-ation to shaft s to bring' a knife under the grinder g.

Presumably the operation Will be clearly understood from the foregoing description and need not be further described. l might of coursc nave substantially the same or a similar construction or support n to the sup^` port m and thus cause direct engagement of the attachment at hoth bearings upon shaft a instead of having indirect engagement through pulley 25 as the present construction shows and either arrangement is the equivalent of the other and may be adopted. The said pulley being` rigid on the shaft and perfectly true inrits periphery, it serves the same cnd as to accuracy of bearing as is shown by standard or post m, and the only practical ditierence is to engage over theY pulley instead. olf over the shaft but both engagements are upon the san-1e axis or the axis of the said shaft though in one caf-c the solid pulley 25 bridges the diiiiercnce.

"prings 333 are interposed between set Lerares screws lil and the swinging support i of the motor chamber adapted to normally bear against the same and hold the said chamber in Werl-:ingr position.

The device is easily applied to any planer without loss of time or labor and with the fairtainty that all the knives will be governed alike and uniformly from end to end What I claim is:

l. in attachment for sharpening-planer knives and the like having' a suitable iframe7 a rotatable grinder movable lengthwise on said frame as grinding` proceeds, means by which said irame is mounted directly upon the shaft carrying' the blades to be sharpened, a motor liivotally supported by said frame and means operatively connect-ing said grinder with said motor,

:2. itin, attachment carrying a grinder adapted to sharpen planer knives consisting oi a frame having parallel horizontal hars and standards carrying said liars curved in Ward at substantially right angles at their lower ends and means on said ends constructed to support said frame directly upon the axis oi the knives to be sharpenedj in combination with a head slidably mounted on said parallel bars, a motor chamber pivotally mounted on said head7 a motor in said chamber havinQ` a downwardly projecting shaft, a grinder operatively connected with the end of the `said shaft and means adjustalily supporting said motor chamber on its pivot. Y

A grinder attachment for planer knives comprising a iframe having upr' f ed to rest upon the axis of said knives and parallel horizontal guides-bars supported ou said uprights, a head slidably mounted on said bars, a hanger supported at the upper portion of said hearty and guide-Ways therefor on the front of said head and a screwv to adjust said hanger on said head.y in com bi-na ion with a motor chamber and motor pivoted on said harige and means to said' hanger laterally in its lower Aportion comprising springs on each side.

in testimony whereof l allia' my signature in presence ot two Witnesses.

HENRY L. PXLEY.

`Vilitncsscs z ll. B. Moena,

E. M. FISHER. 

